Electrical connection



May 1, 1923.

I v. c. HAMISTER ELECTRICAL CONNECTION Filed June 30, 1921 'VEUTQR 1. EiAlfiISTER, F CLEVELAND. GHI'LQ, .ELSSZGNU JOMPANY, 17.1 (3., A GOBPOEATIOH OE 1231s i ELECTRZCAL CQREZECLZIQEZJ.

Application filed June 3-1, 1921. Serial L50. $61,628.

T 0 (all whom it 72mg concern: slice is mad to the, attached drawin show- 55 Be it known that I, VICTOR G. Hiiiiismn, iug; one embodiment thereof Fig. i show a citizen of the United States, residing at inn u sectional elevation along the conduc- Cievelend. in the county of Guyehoge. and tor mid Fig. :3 being a transverse section State of Ohio have invented certain new on line 2-2 of i.

and useful improvements in Electrical Gain in the embodiment illustrated, 3 is a brush nections, of which the following is e specior other lllOClE orprism of rigid material, t ficatiggL is .1 stranded copper cable, 5 is the coin- For the purpose of securing a good mepact-ed comminuted conductive material and 19 chenicel and electrical connection between 6 the seal of condensation product.

a flexible conductor and a block or prism 0:" in melting the connectionfthe conductor 65 rigid materiel it has been proposed form is inserted in the hole or cavity and the cona hole or cavity in the block or prism inductive materiel compacted around it in any sert a conductor of smaller diameter than suitable way, depending on the particular the hole or cavity, and then fill the space material employed. Preferably only a, porbetween the conductor and the surroundtion of the hole or recess is sofilied. space we ing Walls with compacted conductive instsbeing left at the point or points where the rial to form a hard, strong conductive body conductor emerges from the block or prism resisting Withdrawal of the conductor. '50 that the sen niziy be formed in part Such a connection has been used, for exleast Within the block. The materials from a le, ith brushes for electric, machines, which the seal is to he formed are brought and is especially advantageous where the into position in condition in which they material of the brush is carbon or otier can he fornied .to the desired shape and fragile material so that only iiinited pres,- i'he hardened condensation product is then "245' sure can be einpioyed lil'jOllliflg the brush formed in'situ by eny, suitable converting and conductor. Any rigorous clumping or operation. The initial material is prefen 8 wedging action is undesirable Ufidl these ably product incipient condensation circumstances as the brush is apt to be split such as hekeiite liquid A, No. 15 or bake or cracked. lite soiid it the liquid is used it maybe Various kinds of coniniinuted conductive placed o. pool in the desired place and material have been proposed for Inching converted to the herd product (helreiite C) the connection. Metal powder, filings, short for example, by heating for a time to 56 lengths of tine wire, amelgams, graphite, C. under 70 pounds pressure. The solid and mixtures of two orznore 01 these may hakelite .l is preferable in most instances be mentioned. The conductor is ordineriiy to the liquid. It my be used as a. powder.

e copper cable and the rugosltles upon its fine enough to pass it '70 mesh screen and surf-ace enable the compacted instead. this powder, wl'ien moistened with grip it securely. formaldehyde solution, forms a plastic muss iVhen such a connection is subjected. which "may he readily worked into the envso vibration, as it always is when used on ity in which the soul is to he located. The

brush, there is at ndency fertile compacted niestic meteriui is then converted by heat material to disintegrate end out, die and pressure.

stroying the connection. it has been pro" It will of C(hil'lSc he understood that i sin posed to secure the conducting materiel in not, iin'iited to y particular compacted place by e seai of cementing mate: i conductive nor to any specific uringz maximum strength and adhesive proprangernent of conductor and connected body 1 .erties es weil as ability to resist the heat or" rigid materiel. The use of hn-lceiite is and other influences to which the connection described he ein c1 iv for illustration and is subjected. any equivalent condnsution product her- 59 l have found that the hard phcnoi-sideing the requisite strength and cei'nenting hyde condensation products are far superior properties and :hle ot withstanding as sealing material to the cements hereto influences to which the connection is supfore proposed for this purpos For it betjecterl in included in my invention. tor understanding oi the invention refer I ducting material within said cavity electrically connecting said brush and said conductor, and a seal of a hard phenolic condensation productarranged to retain said compacted material in place.

,2. In combination, a. brush having a cavity therein, a conductor having a portion within said cavity, compacted conducting material Within said cavity electrically con meeting said brush and said conductor, and a seal of a hard phenolic condensation product arranged to retain said compacted material in place.

In combination, a carbon brush having a cavity therein, a conductor having a 1'- tion Within said cavity, compacted graphitecontaining material within said cavity electrically connectin said brush and said conductor, and a sea of a hard phenolic condensation product arranged to retain said compacted material in place.

In testimony whereof, I afiix my signature.

VICTOR c. HAMISTER. 

